Index: trunk/src/org/openstreetmap/josm/io/FileWatcher.java
===================================================================
--- trunk/src/org/openstreetmap/josm/io/FileWatcher.java	(revision 17525)
+++ trunk/src/org/openstreetmap/josm/io/FileWatcher.java	(revision 17526)
@@ -54,5 +54,5 @@
         try {
             watcher = FileSystems.getDefault().newWatchService();
-            thread = new Thread((Runnable) this::processEvents, "File Watcher");
+            thread = new Thread(this::processEvents, "File Watcher");
         } catch (IOException | UnsupportedOperationException | UnsatisfiedLinkError e) {
             Logging.error(e);